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SUMMARY:Geoengineering Project - Dr Chris Burgoyne\, CUED
DTSTART:20110311T150000Z
DTEND:20110311T160000Z
UID:TALK29728@talks.cam.ac.uk
CONTACT:Lorna Everett
DESCRIPTION:The SPICE Geoengineering project is investigating the feasibil
 ity of pumping particles into the stratosphere at an elevation of 20km\, w
 ith a view to replicating the effects of large volcanoes.  By injecting pa
 rticles that scatter light at visible wavelengths\, but not in the infra-r
 ed\, some of the incoming sunlight will be reflected back into space witho
 ut interfering with the earth’s own radiated light. The seminar will con
 sider the structural issues associated with providing a tether to a balloo
 n located at 20km\, which will have to withstand not only the high axial f
 orces due to the weight of the tether but also internal pressures as high 
 as 6000 bar.  Consideration will be given to some of the options for the m
 aterial of the tether\, its form of construction\, and the ways in which i
 t might be anchored. Alternative means of getting material to 20 km will a
 lso be considered\, including an outline design of a tower 20km tall made 
 from advanced fibres.  It is concluded that this is not a serious prospect
  with any material that is currently envisaged!\n\n
LOCATION:Engineering Department - **LR6**
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